CN104149813A - Railway vehicle and parking brake relieving system thereof - Google Patents
Railway vehicle and parking brake relieving system thereof Download PDFInfo
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- CN104149813A CN104149813A CN201410421276.7A CN201410421276A CN104149813A CN 104149813 A CN104149813 A CN 104149813A CN 201410421276 A CN201410421276 A CN 201410421276A CN 104149813 A CN104149813 A CN 104149813A
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Abstract
The invention discloses a parking brake relieving system of a railway vehicle. A parking braking check valve is arranged between a brake air cylinder and a parking brake control pulse valve; a normally open first cutout cock is arranged in the middle of an air path of an air suspension air cylinder towards a height valve and an air spring, and a pipeline leads out of the position between the air suspension air cylinder and the first cutout cock and is connected to the position between the parking brake check valve and the parking brake control pulse valve through a normally closed second cutout cock; after air pressure in the vehicle decreases to a certain value and parking brake is carried out automatically, a worker can introduce compressed air in the air suspension air cylinder into a brake by operating an on position and an off position of each cutout cock, and therefore parking brake of the brake is relieved. The parking brake relieving system of the railway vehicle can relieve parking brake of the vehicle by using the compressed air stored in the air suspension air cylinder on the vehicle when the vehicle has no power, relieve labor intensity of workers and bring convenience to operation and maintenance of the vehicle.
Description
Technical field
The present invention relates to guideway vehicle technical field, particularly a kind of guideway vehicle and alleviation parking brake system thereof.
Background technology
Current domestic rail traffic vehicles major part all adopts Pneumatic brake systems, for security consideration, all has parking brake function.A drg with parking brake function is generally installed on each root axle, and the drg with parking brake function on two axles of same bogie truck is diagonal angle to be arranged, the alleviation mode of parking brake is as follows:
1. in the time that rail traffic vehicles has electricity, thereby can alleviate button and send and alleviate instruction electric signal and alleviate all parking brakes of permutation car to the parking brake pulse valve B19 of each car by pressing in driver's cab parking brake.
2. when guideway vehicle is without in electric situation, air compressor quits work, and vehicle air pipeline constantly declines because air leak causes air pressure, and when the Parking Brake Cylinders pressure drop of drg C3 is to a certain extent time, parking brake applies automatically.Because Parking Brake Cylinders is connected with braking reservoir B3 with the air reservoir A1 of this car, therefore when vehicle without electric situation under parking brake when automatically applying, can judge the air pressure of vehicle air reservoir A1 and braking reservoir B3 lower than the numerical value specifying, now can only, by the alleviation draw ring of operation setting on drg C3 one by one mechanically in bogie truck outside, alleviate the parking brake on drg C3.
The gas circuit principle of existing structure can be with reference to shown in Fig. 1, in one train, the air main of each vehicle is connected with the air main of adjacent vehicle in this train by car end flexible pipe, the air reservoir A1 of each car is connected with air main, between air reservoir A1 and braking reservoir B3, be connected by braking check valve B2, air reservoir A1 is connected by Pneumatic Suspension check valve B1 with Pneumatic Suspension reservoir L1.Therefore, pressurized air can only be unidirectional be passed to braking reservoir B3 and Pneumatic Suspension reservoir L1 from air reservoir A1, this has just ensured just in case when air main and air reservoir A1 air pressure are when braking the air pressure of reservoir B3 and Pneumatic Suspension reservoir L1, pressurized air can not be passed to air main and air reservoir A1 from braking reservoir B3 and Pneumatic Suspension reservoir L1, still there is certain braking potential, ensured to a certain extent the safety of train.
The pressurized air a-road-through of braking reservoir B3 is its air feed to braking distributing valve B5, and braking distributing valve B5 provides the pressure air of certain numerical value to make it produce air brake by connecting hose B10 between bogie truck cut out cock B9 and bogie truck and car body to drg C1 and C3 according to train braking instruction.Parking brake control wave valve B19 is led on another road of pressurized air of braking reservoir B3, the electric impulse signal that parking brake control wave valve B19 sends according to train or drg C3 is applied or alleviated parking brake by the button on this valve of M/C.The effect of two-way valve B20 is to prevent the stack of air brake and parking brake, skids or flat sliding avoiding when braking force is excessive to be caused braking.The air of Pneumatic Suspension reservoir L1 leads to levelling valve and air bellow, for giving air bellow air feed.
Vehicle without electric situation under, air compressor quits work, vehicle air pipeline constantly declines because air leak causes air pressure, when the Parking Brake Cylinders pressure drop of drg C3 is to a certain extent time, parking brake applies automatically.Because Parking Brake Cylinders is connected with braking reservoir B3 with the air reservoir A1 of this car, therefore when vehicle without electric situation under parking brake when automatically applying, can judge the air pressure of vehicle air reservoir A1 and braking reservoir B3 lower than the numerical value specifying, now can only, by the alleviation draw ring of operation setting on drg C3 one by one mechanically in bogie truck outside, alleviate the parking brake on drg C3.
Therefore, when vehicle without electric situation under, can only be at outside vehicle M/C alleviation parking brake mechanically, intensity of workers is large, may occur alleviating parking brake in car outside and being difficult to the problem that even cannot operate due to what the problems such as storing cycle regional space is narrow and small caused simultaneously.
Summary of the invention
In view of this, the invention provides a kind of guideway vehicle and alleviate parking brake system, by the transformation of controlling gas circuit, can be at vehicle without electric in the situation that, utilize the pressure air storing in Pneumatic Suspension reservoir on vehicle to alleviate the parking brake of vehicle, be convenient to car operation and maintenance.
The present invention also provides a kind of guideway vehicle of applying above-mentioned alleviation parking brake system.
For achieving the above object, the invention provides following technical scheme:
A kind of guideway vehicle is alleviated parking brake system, comprise main air pipeline, Pneumatic Suspension pipeline and brake piping, described main air pipeline comprises air main and air reservoir, described Pneumatic Suspension pipeline and described brake piping are parallel to the outlet air end of described air reservoir, and the outlet air end of the brake cylinder in described brake piping is parallel with air brake pipeline and parking brake pipeline;
Pneumatic Suspension reservoir in described Pneumatic Suspension pipeline leads in the gas circuit of levelling valve and air bellow and is provided with the first cut out cock of often opening;
Between parking brake control wave valve in the outlet air end of the described brake cylinder in described brake piping and described air brake pipeline, be provided with parking brake check valve, and described parking brake check valve is towards described parking brake control wave valve one-way conduction;
Described guideway vehicle is alleviated parking brake system and is also comprised the second normally closed cut out cock, and one end of described the second cut out cock is communicated in the gas circuit between described Pneumatic Suspension reservoir and described the first cut out cock, the other end is communicated in the gas circuit between described parking brake check valve and described parking brake control wave valve.
Preferably, described the first cut out cock and described the second cut out cock are installed in guest room.
Preferably, described the first cut out cock and described the second cut out cock are installed under same guest room seat and lead sealing are set.
Preferably, the bogie truck cut out cock in described the first cut out cock and described the second cut out cock and described air brake pipeline be arranged under same guest room seat and arrange respectively lead sealing.
A kind of guideway vehicle, comprises alleviation parking brake system, and described alleviation parking brake system is that above-mentioned guideway vehicle is alleviated parking brake system
Can find out from above-mentioned technical scheme, guideway vehicle provided by the invention is alleviated parking brake system, between braking reservoir and parking brake control wave valve, a parking brake check valve is set; The gas circuit centre of leading to levelling valve and air bellow at Pneumatic Suspension reservoir arranges the first cut out cock, and between Pneumatic Suspension reservoir and the first cut out cock, is drawing a pipeline and be connected to by the second cut out cock between parking brake check valve and parking brake control wave valve; By cut out cock turn on and off position can keep Pneumatic Suspension reservoir compressed air in vehicle is long-time afterwards without electricity substantially without leakage;
When vehicle air pressure drop also applies after parking brake automatically to certain numerical value, as needs are alleviated parking brake, staff is turned on and off position and the pressurized air in Pneumatic Suspension reservoir can be incorporated in drg by operation cut out cock, thereby alleviates the parking brake of drg;
After vehicle recovers normally from without electric situation, cut out cock should be placed in to appropriate state, vehicle returns to function under normal circumstances.
Can, at vehicle without electric in the situation that, utilize the pressure air storing in Pneumatic Suspension reservoir on vehicle to alleviate the parking brake of vehicle by this system; At vehicle, without electric in the situation that, staff can arrive car outside hand relieving parking brake mechanically, alleviates intensity of workers; Can solve and alleviate parking brake in car outside and be difficult to the problem that even cannot operate due to what the problems such as storing cycle regional space is narrow and small caused; Little to existing vehicle gas circuit structure change, the part dimension of increase is less, is easy to find installing space, is easy to repair and maintenance.
The present invention also provides a kind of guideway vehicle of applying above-mentioned alleviation parking brake system.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of gas circuit of prior art middle orbit vehicle and parking brake relevant portion;
The guideway vehicle that Fig. 2 provides for the embodiment of the present invention is alleviated the schematic diagram of gas circuit of parking brake system.
Wherein, A1 is air reservoir, and B1 is Pneumatic Suspension check valve, L1 is Pneumatic Suspension reservoir, and L2 is the first cut out cock, and L3 is the second cut out cock, B2 is braking check valve, and B3 is brake cylinder, and B4 is parking brake check valve, B5 is braking distributing valve, and B9 is bogie truck cut out cock, and B10 is connecting hose, C1 and C3 are drg, B19 is parking brake control wave valve, and B20 is two-way valve, and B23 is parking brake flexible pipe.
Detailed description of the invention
The invention discloses a kind of guideway vehicle and alleviate parking brake system, by the transformation to control gas circuit, can, at vehicle without electric in the situation that, utilize the pressure air storing in Pneumatic Suspension reservoir on vehicle to alleviate the parking brake of vehicle, be convenient to car operation and maintenance.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 2, the guideway vehicle that Fig. 2 provides for the embodiment of the present invention is alleviated the schematic diagram of gas circuit of parking brake system.
The guideway vehicle that the embodiment of the present invention provides is alleviated parking brake system, comprise main air pipeline, Pneumatic Suspension pipeline and brake piping, wherein main air pipeline comprises air main and air reservoir A1, Pneumatic Suspension pipeline and brake piping are parallel to the outlet air end of air reservoir, and the outlet air end of the brake cylinder B3 in brake piping is parallel with air brake pipeline and parking brake pipeline; The principle of Pneumatic Suspension pipeline and brake piping can be identical with prior art with structure, do not repeat them here;
Its core improvement is, as shown in the dotted line frame in Fig. 2, the Pneumatic Suspension reservoir L1 in Pneumatic Suspension pipeline leads in the gas circuit of levelling valve and air bellow and is provided with the first cut out cock L2 often opening;
Between parking brake control wave valve B19 in outlet air end and the air brake pipeline of brake cylinder B3 in brake piping, be provided with parking brake check valve B4, and parking brake check valve B4 is towards parking brake control wave valve B19 one-way conduction;
Guideway vehicle is alleviated parking brake system and is also comprised the second normally closed cut out cock L3, and one end of the second cut out cock L3 is communicated in the gas circuit between Pneumatic Suspension reservoir L1 and the first cut out cock L2, the other end is communicated in the gas circuit between parking brake check valve B4 and parking brake control wave valve B19.
Can find out from above-mentioned technical scheme, the guideway vehicle that the embodiment of the present invention provides is alleviated parking brake system, between braking reservoir B3 and parking brake control wave valve B19, parking brake check valve B4 is set; The gas circuit centre of leading to levelling valve and air bellow at Pneumatic Suspension reservoir L1 arranges the first cut out cock L2, and between Pneumatic Suspension reservoir L1 and the first cut out cock L2, is drawing a pipeline and be connected to by the second cut out cock L3 between parking brake check valve B4 and parking brake control wave valve B19; The first cut out cock L2 when flat in opening state; The second cut out cock L3 when flat in closed condition.Therefore the attainable function of the gas circuit principle of this programme function achieved with the gas circuit principle of existing vehicle is identical under normal circumstances.
When vehicle without electric situation under, according to the principle of design of fault-safety principle, vehicle is automatic apply the emergency brake, now, vehicle keeps quiescence.Now staff should be placed in closed condition by the first cut out cock L2, and by Pneumatic Suspension reservoir L1 and levelling valve and air bellow isolation, now Pneumatic Suspension reservoir L1, substantially without leak point, can keep the not obvious variation of air pressure for a long time.
When vehicle air pressure drop also applies after parking brake automatically to certain numerical value, as needs are alleviated parking brake, staff should be placed in opening state by the second cut out cock L3, due to the effect of parking brake check valve B4, can not enter braking reservoir B3 from the pressure air in Pneumatic Suspension reservoir L1, now the pressure air in Pneumatic Suspension reservoir L1 will enter into drg C3 by parts such as parking brake control wave valve B19, thereby alleviate the parking brake of drg C3.
After vehicle recovers normally from without electric situation, cut out cock should be placed in to appropriate state, cut out cock L2 is placed in opening state, and cut out cock L3 is placed in closed condition, and vehicle returns to function under normal circumstances.
Can, at vehicle without electric in the situation that, utilize the pressure air storing in Pneumatic Suspension reservoir on vehicle to alleviate the parking brake of vehicle by this system; At vehicle, without electric in the situation that, staff can arrive car outside hand relieving parking brake mechanically, alleviates intensity of workers; Can solve and alleviate parking brake in car outside and be difficult to the problem that even cannot operate due to what the problems such as storing cycle regional space is narrow and small caused; Little to existing vehicle gas circuit structure change, the part dimension of increase is less, is easy to find installing space, is easy to repair and maintenance.
In order further to optimize above-mentioned technical scheme, the first cut out cock L2 and the second cut out cock L3 are installed in guest room, so that the operation of staff in car body guest room.Parking brake check valve B4 can be according to stringing be conveniently arranged on optional position.
As preferably, the first cut out cock L2 and the second cut out cock L3 are installed under same guest room seat, do not take additional space, and lead sealing is set, and are misused preventing.
In the specific embodiment providing at this programme, the bogie truck cut out cock B9 in the first cut out cock L2 and the second cut out cock L3 and air brake pipeline is arranged under same guest room seat and lead sealing is set respectively, installs, operates and management so that unified.
Certainly, those skilled in the art can also, according to car body practical structures, be arranged on other suitable places in guest room by the first cut out cock L2 and the second cut out cock L3, do not repeat them here.
The embodiment of the present invention also provides a kind of guideway vehicle of applying above-mentioned alleviation parking brake system.
In this specification sheets, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, between each embodiment identical similar part mutually referring to.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. a guideway vehicle is alleviated parking brake system, comprise main air pipeline, Pneumatic Suspension pipeline and brake piping, described main air pipeline comprises air main and air reservoir (A1), described Pneumatic Suspension pipeline and described brake piping are parallel to the outlet air end of described air reservoir, and the outlet air end of the brake cylinder (B3) in described brake piping is parallel with air brake pipeline and parking brake pipeline;
It is characterized in that, the Pneumatic Suspension reservoir (L1) in described Pneumatic Suspension pipeline leads in the gas circuit of levelling valve and air bellow and is provided with the first cut out cock (L2) of often opening;
Between parking brake control wave valve (B19) in outlet air end and the described air brake pipeline of the described brake cylinder (B3) in described brake piping, be provided with parking brake check valve (B4), and described parking brake check valve (B4) is towards described parking brake control wave valve (B19) one-way conduction;
Described guideway vehicle is alleviated parking brake system and is also comprised normally closed the second cut out cock (L3), and one end of described the second cut out cock (L3) is communicated in the gas circuit between described Pneumatic Suspension reservoir (L1) and described the first cut out cock (L2), the other end is communicated in the gas circuit between described parking brake check valve (B4) and described parking brake control wave valve (B19).
2. guideway vehicle according to claim 1 is alleviated parking brake system, it is characterized in that, described the first cut out cock (L2) and described the second cut out cock (L3) are installed in guest room.
3. guideway vehicle according to claim 2 is alleviated parking brake system, it is characterized in that, described the first cut out cock (L2) and described the second cut out cock (L3) are installed under same guest room seat and lead sealing is set.
4. guideway vehicle according to claim 3 is alleviated parking brake system, it is characterized in that being arranged under same guest room seat and lead sealing is set respectively of the bogie truck cut out cock (B9) in described the first cut out cock (L2) and described the second cut out cock (L3) and described air brake pipeline.
5. a guideway vehicle, comprises alleviation parking brake system, it is characterized in that, described alleviation parking brake system is that the guideway vehicle described in claim 1-4 any one is alleviated parking brake system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410421276.7A CN104149813B (en) | 2014-08-25 | 2014-08-25 | A kind of rail vehicle and alleviation parking brake system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410421276.7A CN104149813B (en) | 2014-08-25 | 2014-08-25 | A kind of rail vehicle and alleviation parking brake system thereof |
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| CN104149813A true CN104149813A (en) | 2014-11-19 |
| CN104149813B CN104149813B (en) | 2016-07-06 |
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Cited By (16)
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| CN104742890A (en) * | 2015-04-10 | 2015-07-01 | 中铁四局集团有限公司 | Double-air-path brake system of battery car |
| CN105711578A (en) * | 2016-03-31 | 2016-06-29 | 克诺尔车辆设备(苏州)有限公司 | Parking brake control unit with remote relieving and state monitoring functions |
| CN106043262A (en) * | 2016-06-12 | 2016-10-26 | 中车青岛四方机车车辆股份有限公司 | Method, device and system for cutting bogie brake off |
| CN106428097A (en) * | 2016-11-01 | 2017-02-22 | 中车株洲电力机车有限公司 | Locomotive and parking brake machine release system thereof |
| CN106428070A (en) * | 2016-11-25 | 2017-02-22 | 中车长春轨道客车股份有限公司 | Compressed air control and distribution module for railway vehicle |
| CN106476775A (en) * | 2016-11-16 | 2017-03-08 | 中车兰州机车有限公司 | Locomotive air brakes and locomotive |
| CN107284468A (en) * | 2017-06-29 | 2017-10-24 | 湘电重型装备有限公司 | A kind of unmanned engine brakes |
| CN108116436A (en) * | 2017-11-16 | 2018-06-05 | 中车四方车辆有限公司 | A kind of passenger train air feed system |
| CN108454649A (en) * | 2018-04-04 | 2018-08-28 | 湖南高速铁路职业技术学院 | Locomotive remotely alleviates system with EMU parking brake |
| CN109080659A (en) * | 2018-09-12 | 2018-12-25 | 宝鸡中车时代工程机械有限公司 | The automobile-used parking brake control device of track |
| CN109080611A (en) * | 2018-07-10 | 2018-12-25 | 克诺尔车辆设备(苏州)有限公司 | It is a kind of to be realized the parking brake control device remotely alleviated under rescue mode |
| CN109318928A (en) * | 2017-12-20 | 2019-02-12 | 中车长春轨道客车股份有限公司 | A kind of train braking cylinder control pressurer system and track train |
| CN109435927A (en) * | 2018-09-30 | 2019-03-08 | 中铁武汉勘察设计研究院有限公司 | Track power flatcar and its braking system and brake control method |
| CN110304100A (en) * | 2019-07-05 | 2019-10-08 | 中车青岛四方车辆研究所有限公司 | Parking brake control module and rail vehicle |
| CN111337240A (en) * | 2020-04-26 | 2020-06-26 | 河北京车轨道交通车辆装备有限公司 | Bogie braking system mobile test bench |
| CN111547099A (en) * | 2019-02-12 | 2020-08-18 | 纳博特斯克有限公司 | Braking device for railway vehicles |
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| CN104742890B (en) * | 2015-04-10 | 2017-10-31 | 中铁四局集团有限公司 | Double-air-path brake system of battery car |
| CN104742890A (en) * | 2015-04-10 | 2015-07-01 | 中铁四局集团有限公司 | Double-air-path brake system of battery car |
| CN105711578B (en) * | 2016-03-31 | 2018-06-01 | 克诺尔车辆设备(苏州)有限公司 | It is a kind of that there is the remotely parking brake control unit of alleviation and condition monitoring |
| CN105711578A (en) * | 2016-03-31 | 2016-06-29 | 克诺尔车辆设备(苏州)有限公司 | Parking brake control unit with remote relieving and state monitoring functions |
| CN106043262B (en) * | 2016-06-12 | 2018-11-27 | 中车青岛四方机车车辆股份有限公司 | Cut off the methods, devices and systems of bogie braking |
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| CN106428097A (en) * | 2016-11-01 | 2017-02-22 | 中车株洲电力机车有限公司 | Locomotive and parking brake machine release system thereof |
| CN106476775A (en) * | 2016-11-16 | 2017-03-08 | 中车兰州机车有限公司 | Locomotive air brakes and locomotive |
| CN106428070A (en) * | 2016-11-25 | 2017-02-22 | 中车长春轨道客车股份有限公司 | Compressed air control and distribution module for railway vehicle |
| CN107284468A (en) * | 2017-06-29 | 2017-10-24 | 湘电重型装备有限公司 | A kind of unmanned engine brakes |
| CN108116436A (en) * | 2017-11-16 | 2018-06-05 | 中车四方车辆有限公司 | A kind of passenger train air feed system |
| CN109318928A (en) * | 2017-12-20 | 2019-02-12 | 中车长春轨道客车股份有限公司 | A kind of train braking cylinder control pressurer system and track train |
| CN108454649A (en) * | 2018-04-04 | 2018-08-28 | 湖南高速铁路职业技术学院 | Locomotive remotely alleviates system with EMU parking brake |
| CN108454649B (en) * | 2018-04-04 | 2023-08-15 | 湖南高速铁路职业技术学院 | Remote relieving system for parking brake of locomotive and motor train unit |
| CN109080611A (en) * | 2018-07-10 | 2018-12-25 | 克诺尔车辆设备(苏州)有限公司 | It is a kind of to be realized the parking brake control device remotely alleviated under rescue mode |
| CN109080611B (en) * | 2018-07-10 | 2024-04-26 | 克诺尔车辆设备(苏州)有限公司 | Parking brake control device capable of realizing remote relief in rescue mode |
| CN109080659A (en) * | 2018-09-12 | 2018-12-25 | 宝鸡中车时代工程机械有限公司 | The automobile-used parking brake control device of track |
| CN109080659B (en) * | 2018-09-12 | 2023-08-18 | 宝鸡中车时代工程机械有限公司 | Parking brake control device for railway vehicle |
| CN109435927B (en) * | 2018-09-30 | 2024-03-15 | 中铁武汉勘察设计院有限公司 | Rail power flat car and braking system and braking control method thereof |
| CN109435927A (en) * | 2018-09-30 | 2019-03-08 | 中铁武汉勘察设计研究院有限公司 | Track power flatcar and its braking system and brake control method |
| CN111547099A (en) * | 2019-02-12 | 2020-08-18 | 纳博特斯克有限公司 | Braking device for railway vehicles |
| CN111547099B (en) * | 2019-02-12 | 2021-09-24 | 纳博特斯克有限公司 | Braking device for railway vehicles |
| CN110304100B (en) * | 2019-07-05 | 2020-07-24 | 中车青岛四方车辆研究所有限公司 | Parking brake control module and rail vehicle |
| CN110304100A (en) * | 2019-07-05 | 2019-10-08 | 中车青岛四方车辆研究所有限公司 | Parking brake control module and rail vehicle |
| CN111337240A (en) * | 2020-04-26 | 2020-06-26 | 河北京车轨道交通车辆装备有限公司 | Bogie braking system mobile test bench |
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